Question 9 Solve the following systems of questions using Cramer method. a) X+2Y-Z=10 X-2Z=8 X-5Y-Z=0 b) 2X1+3X3-X4=6 X2+X3-2X4=-2 X1+2X4=0 X1-2X2+3X3+4X4=12
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The coefficient matrix is: | 1 2 -1 | | 1 0 -2 | | 1 -5 -1 | The determinant of the coefficient matrix is: det(A) = 1(0(-1) - (-2)(-5)) - 2(1(-1) - (-2)(1)) + (-1)(1(-5) - 1(0)) = 1(0 + 10) - 2(-1 + 2) + (-1)(-5 - 0) = 10 + 2 + 5 = Show more…
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